Method of producing complementary insole-outsole combinations



March 21, 1933. F s jcc 1,902,725

METHOD OF PRODUCING COMPLEMENTARY INSOLE-OUTSOLE COMBINATIONS Filed Nov. 7, 1931 2 Sheets-Sheet 1 .Zizven 22' Ficzzz Jicc-cz March 21 1933. F. same); v 1,902,725

METHOD OF PRODUCING COMPLEMENTARY I NSOLE-OUTSOLE QOMBINATIONS Filed Nov. 7, 1951 2 Sheets-Sheet 2 I Patented Mar. 21, 1933 amrral), STATES PATENT. OFFICE FRANK SBICCA, OF PHILADELPHIA, PENNSYLVANIA, ASBIGNOB TO SBICCA-METHOD snons mconromrnn, or PHILADELPHIA, rnnnsynvmm, A conrona'rron or.

DELAWARE Application filed November 7, 1931. Serial 110.5735".

' tions thereof reduced in thickness together with an insole comprising a rand portion to fit about the margins of the projection thus left upon the upper surface of the outer sole and an attached shank. These combinations have, however, been separately produced; that is to say, the rand removed from'the outer sole and the material removed from the shankand heel of the outer solo in reducing the thickness thereof are waste material and the material removed from the central portion of the ball section of the inner sole is likewise waste material. For this reason, previous shoe making methods involving the use of complementary insole-outsole combinations of this character have been relatively expensive to produce. Furthermore, they prove unsatisfactory in that it is practically impossible to provide for an accurate fit between the insole and outsole when they are placed together in the manufacture of the shoe. Additionally, it is necessary that special tools he provided in the formation of the inner sole.

In a prior application. Serial No. 512,965,

filed February 2, 1931, for shoe and method of making the same, patented December 29, 1931, No. 1,838,708, I have described a method of constructing such shoes which eliminates objections to the method above referred to, to the extent that the rand removed from the outer sole is employ d in the construction of the shoe and instead of employing an inner sole blank which is of full length, a blank is provided which is merely a shank piece 'to which the ends of the rand are secured. My prior method. furthermore, eliminated those objections to the ordinary insoleoutsole combinations based on the failure of the rand portion of the insole to properly fit about the marginal portions of the sole, but still involved the loss of material removed from the shank and heel portions of the outer sole RE-ISS and the necessary cost of the shank piece of the inner sole.

An important object of the present invention Is the provision of a method of producing complementary insole-outsole combinations n whlch all waste is eliminated and an absolute fit assured between the insole and out sole in the completed shoe.

A further object of the invention is the PIOVISlOIl of' a -method of producing such combinations which may be readily carried out at the factory and by use of machines commonly employed at the factory with but slight modifications thereof.

These and other objects I attain by the construction shown in the accompanying drawings wherein, for the purpose of illustration. I have shown a preferred embodiment of my invention, and wherein:

Figure 1 is a plan of a shoe blank illustrating the same as split in the performance of one step of the process;

Fig. 2 is a side elevation of the blank of Fig. 1;

Fig. 3 is a plan of the blank channeled in the performance of a second operation;

Fig. 4 is a plan of the blank showing a further channeling operation;

Fig. 5 is an enlarged section on the line 55 of Fig. 4;

Fig. 6 is a fragmentary section on the line 66ofFig.7;

Fig. 7 is a plan of the blank illustrating a still further step in the process, the arrows indicating the movement of the splitting knife;

Fig. 8 is a side elevation of the blank of Fig. 7 after completion of the splitting process illustrated therein;

Fig. 9 is a top plan of the outer sole; and Fig. 10 is a bottom plan of the inner sole.

Referring now more particularly to the drawings, the numeral 10 generally designates a sole blank having flesh and grain sides indicated respectively at 11 and 12. This blank in the production of the combination is passed through the following steps which while given in a preferred order, may obviorder of recitation A split 13 is formed in the blank 10, this split paralleling the flesh and grain sides of the blank and extending from the rear end of the heel of the blank to a transverse line 14 at the junction of the ball and shank sections of the blank. A rand 15 is then separated from the margin of the ball section of the shoe at the flesh side thereof, this rand being removed by a combination of horizontal and inclined channel cuts 16 and 17, of which the horizontal channel forms a, continnation of the split 13 extending inwardly from the blank margins a predetermined distance and extending entirely about the ball section. The inclined channel extends about the margins of the ball section of the blank and is directed downwardly and outwardly from the flesh side of the blank, terminating at its lower end at the inner end of the horizontal channel 16. The inclined channel has a branch 18 extending between-the inner ends thereof from the flesh side of the sole in wardly and downwardly, the inner lower end thereof coinciding with the forward end of the split 13 so thatthe insole blank is severed from the outer sole entirely about the pnojection A formed on the ball section of this sole. These operations completely free the insole and it will be obvious that the insole and outsole must be absolutely complementary and will, accordingly, interfit perfectly in the assembly of the shoe. Additionally, it will be noted that there is no waste whatever in the production of the insole-outsole combination, the insole comprising merely those portions of the flesh side of the blank removed in the formation of the projection A upon the upper surface of the outer sole.

The process employed 1n the production of shoes by'use o-f combinations of this charac ter is preferably that set forth in my prior application above identified, but may obviously be employed in the productionof other shoes, as for example, shoes produced by processes similar to that described in the patent to J. A. Kelly, granted August 31, 1926, No. 1,597,685, for art of making shoes. 1

Since, as hereinbefore noted, the particular order of the steps employed in the production of the insole is immaterial, it is to beunderstood that I do not wishto be limitedtothe Y blank of the desired thickness of the outsole and having a grain and a flesh side, splitting the heel and shankportions of the sole blank to form insole and outsole shank-pieces, re-

section of the flesh side of the solefwhile leavin the same attached to the forward end o the insole shank piece, and splittingthe sole between the shank and ball sections tary insole-outsole combinations comprising.

the following steps, providing a leather sole blank of the desired thickness of the outsole and having a grain and a flesh side, splitting the heel and shank portions of the sole blank to form insole and outsoleshank pieces, removing a. rang from the margin of the'ball seetion of the flesh side of the sole 'while leaving the same attached to the forward end of the insole shank pieee'and cutting inwardly from the-flesh side of the sole blank to a depth equal tothe thickness of the desired insole and on a transverse line extending from terminal to terminal of the'rand..

3. The method of producing complementaryinsole-outsole combinations comprising the'following steps, providing a leather sole blank of the desired thickness of the outsoleand having a-grain and flesh side, splitting the heel and shank portions of the sole blank to form insole and outsole shank pieces, removing a rand from the margin of the ball section of the flesh side of the sole while leaving the same attached to the forward end of the ins ole shank piece and forming a cut' extending transversely from terminal to terminal of the rand and inwardly from the 'flesh side of the blank to the forward end of the split severing the heel and shank por tions of the blank. w

4. A unitary insole having an internally bevelled marginal frame at its-ball section, said insole comprising the flesh side of'a sole blank from which a unitary outsole has been removed, said insole havingits lower surface including said bevelled marginal wall of said-frame exactly complemental to the upper surface of the removed outsole.

thereof in the appended moving a rand from the margin of the ball FRANK SBICCA. 7 n 

